What’s Vulnerable › Vulnerabilities

CVE-2026-9353: NousResearch hermes-agent Skills Guard Multi-Word Prompt skills_guard.py injection

• Severity: high (CVSS 7.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-24 · updated 2026-07-23
• Weakness: CWE-74

Description

A security vulnerability has been detected in NousResearch hermes-agent up to 2026.4.23. Impacted is an unknown function of the file agent/skills_guard.py of the component Skills Guard Multi-Word Prompt Handler. The manipulation of the argument THREAT_PATTERNS leads to injection. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products

• NousResearch hermes-agent: 2026.4.0, 2026.4.1, 2026.4.2, 2026.4.3, 2026.4.4, 2026.4.5 (+18)

References

• https://gist.github.com/YLChen-007/82a3539d6358842e69dfaef0a9fcf14a
• https://vuldb.com/submit/812216
• https://vuldb.com/vuln/365316
• https://vuldb.com/vuln/365316/cti

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